摘要：The Planck Collaboration made its final data release in 2018. In this paper we describe beam-deconvolution map products made fromPlanckLow Frequency Instrument (LFI) data using theartDecodeconvolution code to symmetrize the effective beam. The deconvolution results are auxiliary data products, available through thePlanckLegacy Archive. Analysis of these deconvolved survey difference maps reveals signs of residual signal in the 30 GHz and 44 GHz frequency channels. We produce low-resolution maps and corresponding noise covariance matrices (NCVMs). The NCVMs agree reasonably well with the half-ring noise estimates except for 44 GHz, where we observe an asymmetry betweenEEandBBnoise spectra, possibly a sign of further unresolved systematic error. In contrast to the officialPlanckLFI maps, the beam-deconvolution maps have not been corrected for bandpass mismatch, and the residual noise is not well approximated by white noise.
关键词：encosmic background radiationmethods: data analysis
